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KMID : 1005220090240030139
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Journal of Embryo Transfer
2009 Volume.24 No. 3 p.139 ~ p.143
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Changes of Estradiol, Progesterone and Vaginal Epithelial Cells of a Pseudopregnant Captive Coyote (Canis latrans) during Breeding Season
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Yong Hwan-Yul
Park Jung-Eun
Son Chun-Soo
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Abstract
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Most captive canids and felids at Zoos in advanced countries have been examined enough to apply artificial reproductive techniques to them. We investigated reproductive hormones and vaginal epithelial cells of a 6-year-old, female coyote, hoping these data could eventually be extended to artificial insemination with frozen-thawed conspecific semen at Seoul Zoo. As a relative of pet dogs, coyote exhibited a similar appearance with only minor differences. In vaginal smear, an increase in the number of superficial cells suggests that the bitch has reached a state close to estrus. A sudden decrease of estradiol and increase of progesterone is considered as a preovulatory event. Vaginal epithelial cells and hormones might be useful for determining the optimal time of artificial insemination in coyotes’ breeding.
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KEYWORD
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coyote, pseudopregnant, estradiol, progesterone, vaginal epithelium
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